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US7430930B2 - Sampler for taking a defined amount of sample of a fluid medium from a sample-taking site - Google Patents

Sampler for taking a defined amount of sample of a fluid medium from a sample-taking site Download PDF

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Publication number
US7430930B2
US7430930B2 US11/088,745 US8874505A US7430930B2 US 7430930 B2 US7430930 B2 US 7430930B2 US 8874505 A US8874505 A US 8874505A US 7430930 B2 US7430930 B2 US 7430930B2
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US
United States
Prior art keywords
sample
taking
sampler
fluid medium
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/088,745
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US20050268733A1 (en
Inventor
Robert Zeller
Peter Dietrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser Wetzer GmbH and Co KG
Original Assignee
Endress and Hauser Wetzer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Endress and Hauser Wetzer GmbH and Co KG filed Critical Endress and Hauser Wetzer GmbH and Co KG
Assigned to ENDRESS + HAUSER WETZER GMBH + CO. KG reassignment ENDRESS + HAUSER WETZER GMBH + CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZELLER, ROBERT, DIETRICH, PETER
Publication of US20050268733A1 publication Critical patent/US20050268733A1/en
Application granted granted Critical
Publication of US7430930B2 publication Critical patent/US7430930B2/en
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
    • G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
    • G01F3/06—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
    • G01F3/08—Rotary-piston or ring-piston meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/02—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement
    • G01F3/04—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls
    • G01F3/06—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with measuring chambers which expand or contract during measurement having rigid movable walls comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
    • G01F3/10—Geared or lobed impeller meters

Definitions

  • the invention relates to a sampler for taking a defined amount of sample of a fluid medium from a sample-taking site by means of a tubular line, which can be brought into contact with the fluid medium at the sample-taking site and via which the fluid medium can be conducted into at least one sample storing receptacle, with a pump, which moves the medium via the tubular line from the sample-taking site into the receptacle, and with a control unit, which activates the pump such that it fills the defined amount of sample into the receptacle.
  • samplers are already known from the state of the art. Available from Endress+Hauser for instance, are the transportable and stationary ASP-Port 2000 and ASP-Station 2000 samplers for the defined taking of samples of a fluid medium from a sample-taking site. In the know samplers, vacuum diaphragm, or membrane, pumps are used; the metering of the samples into the sample storing receptacles occurs by means of microprocessor-controlled, pneumatic components.
  • the vacuum principle is used.
  • the sequence control in the sample-taking works as follows: In a first step, the metering unit is pneumatically sealed-off, by the closing of a pinch valve, in order to seal the flexible, tubular line in the form of an outlet hose. The diaphragm pump then blows through the metering container to empty the suction line. This is followed by the sucking-in of fresh sample, until a defined fill level is reached in the metering container. In a third step, a selected, defined sample volume is metered; excess sample flows back to the sample-taking site. Finally, the pinch valve is re-opened, and the metered amount of sample is discharged into the sample storing receptacle.
  • the Liqui-Port 2000 sampler is a portable sampler for the fully automatic taking and distributing of samples of a fluid medium.
  • the suction intake and metering of the sample liquid is done with a peristaltic pump.
  • a flexible pump hose is periodically deformed by engaging rollers, whereby a pumping action is produced.
  • a pressure sensor is used for detecting the medium supplied in the tubular line.
  • the sample-taking in the case of the Liqui-Port 2000 can occur at defined points in time, due to the presence of an integrated timer function. Additionally, it is possible to perform the sample-taking under quantity, or flow, control.
  • the automatic sample distribution is accomplished by means of an automatically rotatable distributor pipe, which is positioned successively with reference to the individual storing receptacles arranged in a carousel.
  • An object of the invention is to provide a sampler of simplified structure.
  • Rotary piston pumps are generally known and available from, among others, the firm Börger in various embodiments for various applications. Rotary piston pumps are durable and require little maintenance.
  • sampler of the invention such is embodied as a mobile unit or as a stationary unit.
  • a preferred embodiment of the sampler of the invention provides a sensor, with which the amount of sample supplied through the tubular line and/or dispensed into the sample storing receptacle is determined.
  • the sensor is an angle, or rotation, sensor, which registers the angular rotation and/or rotary movement of a rotary shaft of the rotary piston pump; the sequence control operates the rotary piston pump on the basis of the measured value delivered by the angle, or rotation, sensor, such that the defined amount of sample is supplied through the tubular line into one of the sample storing receptacles.
  • the sampler of the invention is very simple in this respect, since it comprises just the rotary piston pump and a rotation sensor, which registers the revolutions of the piston.
  • the senor is a measuring device for determining the flow through the tubular line.
  • the flow measuring device is a pressure sensor.
  • An appropriate pressure sensor is used, for example, in the transportable Liqui-Port 2000 sampler, which is, as indicated above, available from the assignee.
  • any other kind of flow measuring device can be used in connection with the sampler of the invention.
  • the senor in the simplest case, can be a detector that recognizes whether a medium is flowing through the tubular line, or not.
  • a further development of the apparatus of the invention provides that a timer function is included, which starts the sample-taking at predetermined points in time.
  • FIG. 1 is a schematic drawing of an embodiment of the sampler of the invention.
  • the sampler 1 of FIG. 1 serves for the taking of defined amounts of sample of a fluid medium 3 from a sample-taking site 2 ; the samples collected by suction are dispensed via the distributor system 6 successively into the provided sample storing receptacles 5 . If needed, a cooling system is provided in the sampler 1 , for cooling the samples taken from the sample-taking site to a desired temperature. Appropriate cooling systems are sufficiently known and are available, for example, from the assignee in connection with the aforementioned types of samplers.
  • the sample-taking from the sample-taking site 2 occurs, as indicated above, via the tubular line 4 .
  • the rotary piston pump 7 By means of the rotary piston pump 7 , the fluid medium 3 is sucked out of the sample-taking site 2 , and a pre-defined amount is supplied via the rotary piston pump 7 into one of the sample storing receptacles 5 .
  • the sequence control 9 controls e.g. the point in time when the sample is taken, the rotation of the rotary piston pump 7 , and the correct positioning of the distributor pipe 6 , as a part of the tubular line 4 , relative to the sample storing receptacles 5 .
  • the sequence control 9 i.e.
  • the electronics part is spatially set apart from the “wet part”, thus the components which come in contact with the fluid medium 3 .
  • the electronics part is located in the upper part of the housing 10 of the sampler 1 , as can be seen in FIG. 1 .
  • a angle, or rotation, sensor 8 is provided in the rotary piston pump 7 , for registering the rotation of the piston.
  • the number of revolutions of the piston of the rotary piston pump 7 , or the angular rotation of the piston of the rotary piston pump 7 is proportional to the volume flow of the fluid medium 3 through the tubular line 4 .
  • the flow of the fluid medium 3 through the tubular line 4 can be determined via a flow measuring device 11 , e.g. a differential pressure sensor.
  • the measured data of the flow measuring device 11 are forwarded via a connection cable to the sequence control 9 and evaluated there by a microprocessor.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

A sampler for taking a defined amount of sample of a fluid medium from a sample-taking site, with a tubular line, which can be brought into contact with the fluid medium at the sample-taking site, for conducting the fluid medium into at least one sample storing receptacle, with a pump. The pump moves the medium via the tubular line into the sample storing receptacle. A sequence control activates the pump, such that it dispenses the defined amount of sample into the sample storing receptacle. The pump is a rotary piston pump.

Description

FIELD OF THE INVENTION
The invention relates to a sampler for taking a defined amount of sample of a fluid medium from a sample-taking site by means of a tubular line, which can be brought into contact with the fluid medium at the sample-taking site and via which the fluid medium can be conducted into at least one sample storing receptacle, with a pump, which moves the medium via the tubular line from the sample-taking site into the receptacle, and with a control unit, which activates the pump such that it fills the defined amount of sample into the receptacle.
BACKGROUND OF THE INVENTION
Corresponding samplers are already known from the state of the art. Available from Endress+Hauser for instance, are the transportable and stationary ASP-Port 2000 and ASP-Station 2000 samplers for the defined taking of samples of a fluid medium from a sample-taking site. In the know samplers, vacuum diaphragm, or membrane, pumps are used; the metering of the samples into the sample storing receptacles occurs by means of microprocessor-controlled, pneumatic components.
In the known samplers, the vacuum principle is used. The sequence control in the sample-taking works as follows: In a first step, the metering unit is pneumatically sealed-off, by the closing of a pinch valve, in order to seal the flexible, tubular line in the form of an outlet hose. The diaphragm pump then blows through the metering container to empty the suction line. This is followed by the sucking-in of fresh sample, until a defined fill level is reached in the metering container. In a third step, a selected, defined sample volume is metered; excess sample flows back to the sample-taking site. Finally, the pinch valve is re-opened, and the metered amount of sample is discharged into the sample storing receptacle.
In the case of this known technique, problems arise in certain cases in that, during the collecting of the sample, a sedimentation of the sample can occur in the metering container, which potentially can lead to a corruption of the sample.
Another sampler known from the state of the art is also available from Endress+Hauser known as the Liqui-Port 2000 sampler. The Liqui-Port 2000 sampler is a portable sampler for the fully automatic taking and distributing of samples of a fluid medium. The suction intake and metering of the sample liquid is done with a peristaltic pump. In such case, a flexible pump hose is periodically deformed by engaging rollers, whereby a pumping action is produced. For detecting the medium supplied in the tubular line, a pressure sensor is used. The sample-taking in the case of the Liqui-Port 2000 can occur at defined points in time, due to the presence of an integrated timer function. Additionally, it is possible to perform the sample-taking under quantity, or flow, control. The automatic sample distribution is accomplished by means of an automatically rotatable distributor pipe, which is positioned successively with reference to the individual storing receptacles arranged in a carousel.
SUMMARY OF THE INVENTION
An object of the invention is to provide a sampler of simplified structure.
This object is achieved by selecting, as the pump, a rotary piston pump. Rotary piston pumps are generally known and available from, among others, the firm Börger in various embodiments for various applications. Rotary piston pumps are durable and require little maintenance.
In a preferred further development of the sampler of the invention, such is embodied as a mobile unit or as a stationary unit.
A preferred embodiment of the sampler of the invention provides a sensor, with which the amount of sample supplied through the tubular line and/or dispensed into the sample storing receptacle is determined. Especially, the sensor is an angle, or rotation, sensor, which registers the angular rotation and/or rotary movement of a rotary shaft of the rotary piston pump; the sequence control operates the rotary piston pump on the basis of the measured value delivered by the angle, or rotation, sensor, such that the defined amount of sample is supplied through the tubular line into one of the sample storing receptacles. Thus, with the rotary piston pump, a flow-proportional sample-taking can be implemented in simple manner, since the rotation of the piston of the pump has a defined relationship with the supplied volume of sample. In principle, it is, therefore, sufficient to register the rotation of the piston and suitably evaluate such in known manner. The construction of the sampler of the invention is very simple in this respect, since it comprises just the rotary piston pump and a rotation sensor, which registers the revolutions of the piston.
Additionally, an advantageous further development of the sampler of the invention provides that the sensor is a measuring device for determining the flow through the tubular line. Especially, the flow measuring device is a pressure sensor. An appropriate pressure sensor is used, for example, in the transportable Liqui-Port 2000 sampler, which is, as indicated above, available from the assignee. Naturally, also any other kind of flow measuring device can be used in connection with the sampler of the invention.
Alternatively, or supplementally, the sensor, in the simplest case, can be a detector that recognizes whether a medium is flowing through the tubular line, or not.
In order to enable an automatic sample-taking, a further development of the apparatus of the invention provides that a timer function is included, which starts the sample-taking at predetermined points in time.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be explained in greater detail on the basis of FIG. 1, which is a schematic drawing of an embodiment of the sampler of the invention.
 DESCRIPTION OF THE PREFERRED EMBODIMENT
The sampler 1 of FIG. 1 serves for the taking of defined amounts of sample of a fluid medium 3 from a sample-taking site 2; the samples collected by suction are dispensed via the distributor system 6 successively into the provided sample storing receptacles 5. If needed, a cooling system is provided in the sampler 1, for cooling the samples taken from the sample-taking site to a desired temperature. Appropriate cooling systems are sufficiently known and are available, for example, from the assignee in connection with the aforementioned types of samplers.
The sample-taking from the sample-taking site 2 occurs, as indicated above, via the tubular line 4. By means of the rotary piston pump 7, the fluid medium 3 is sucked out of the sample-taking site 2, and a pre-defined amount is supplied via the rotary piston pump 7 into one of the sample storing receptacles 5. The sequence control 9 controls e.g. the point in time when the sample is taken, the rotation of the rotary piston pump 7, and the correct positioning of the distributor pipe 6, as a part of the tubular line 4, relative to the sample storing receptacles 5. Usually, the sequence control 9, i.e. the electronics part, is spatially set apart from the “wet part”, thus the components which come in contact with the fluid medium 3. Preferably, the electronics part is located in the upper part of the housing 10 of the sampler 1, as can be seen in FIG. 1.
In order to assure that always the defined amount of sample is dispensed into a sample storing receptacle 5, a angle, or rotation, sensor 8 is provided in the rotary piston pump 7, for registering the rotation of the piston. The number of revolutions of the piston of the rotary piston pump 7, or the angular rotation of the piston of the rotary piston pump 7, is proportional to the volume flow of the fluid medium 3 through the tubular line 4. Additionally, or alternatively, the flow of the fluid medium 3 through the tubular line 4 can be determined via a flow measuring device 11, e.g. a differential pressure sensor. The measured data of the flow measuring device 11 are forwarded via a connection cable to the sequence control 9 and evaluated there by a microprocessor.

Claims (3)

1. A sampler for taking a defined amount of sample of a fluid medium from a sample-taking site having:
at least one sample storing receptacle;
a tubular line, which is brought into contact with the fluid medium at the sample-taking site, for conducting the fluid medium into said at least one sample storing receptacle; a rotary piston pump, which moves the medium via said tubular line into said at least one sample storing receptacle;
a sequence control, which activates the pump, such that it dispenses the defined amount of sample into said at least one sample storing receptacle, and
a sensor, with which the amount of sample conveyed through said tubular line and dispensed into said at least one sample storing receptacle is determined, wherein:
said sensor is one of: an angle sensor and a rotation sensor, which registers the angular rotation and/or the rotary movement of said rotary piston pump, and
said sequence control controls said rotary piston pump on the basis of measured values delivered by said angle sensor or said rotation sensor such that the defined amount of sample is supplied through said tubular line into said at least one sample storing receptacle.
2. The sampler as claimed in claim 1, wherein:
the sampler is embodied as one of a mobile unit and a stationary unit.
3. The sampler as claimed in claim 1, wherein:
a timer function is provided, which activates the sampler at a predetermined point in time.
US11/088,745 2004-03-25 2005-03-25 Sampler for taking a defined amount of sample of a fluid medium from a sample-taking site Expired - Fee Related US7430930B2 (en)

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DE102004015083.4 2004-03-25
DE102004015083A DE102004015083A1 (en) 2004-03-25 2004-03-25 Sampler for taking a defined sample amount of a fluid medium from a sample sampling point

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US20110056312A1 (en) * 2009-09-08 2011-03-10 Endress + Hauser Conducta Gesellschaft Fur Mess-Und Regeltechnik Mbh + Co. Kg Apparatus for handling a liquid sample
WO2012044534A1 (en) 2010-09-27 2012-04-05 Johnson & Johnson Vision Care. Inc. Translating presbyopic contact lens
WO2012044532A1 (en) 2010-09-27 2012-04-05 Johnson & Johnson Vision Care, Inc. Asymmetric translating presbyopic contact lens
WO2012047549A1 (en) 2010-09-27 2012-04-12 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens
WO2013032681A1 (en) 2011-08-26 2013-03-07 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens pair
EP2725408A1 (en) 2012-10-26 2014-04-30 Johnson & Johnson Vision Care Inc. Contact lens with improved fitting characteristics
EP3104213A1 (en) 2015-06-08 2016-12-14 Johnson & Johnson Vision Care Inc. Contact lens with optimized performance and method of design
EP3168674A1 (en) 2015-11-16 2017-05-17 Johnson & Johnson Vision Care Inc. Truncated translating contact lens with optimized performance and method of design
US9823493B2 (en) 2012-08-30 2017-11-21 Johnson & Johnson Vision Care, Inc. Compliant dynamic translation zones for contact lenses
EP3273293A1 (en) 2016-07-18 2018-01-24 Johnson & Johnson Vision Care Inc. Mold for contact lens with non-rotationally symmetric rim or edge
US20200393336A1 (en) * 2019-06-14 2020-12-17 Emerald Coast Manufacturing, LLC Method and Apparatus for Sampling Liquid
US20210072121A1 (en) * 2019-09-06 2021-03-11 Elemental Scientific, Inc. System and method for trapping fluid at a valve
US20220276133A1 (en) * 2016-04-28 2022-09-01 Shanghai Kohler Electronics, Ltd. Device for collecting liquid and smart toilet comprising the same
US11446671B2 (en) * 2016-03-29 2022-09-20 Leica Microsystems Cms Gmbh Self-contained slide processing unit for biological specimens
US11927508B1 (en) * 2020-01-21 2024-03-12 Elemental Scientific, Inc. System and method for handling small samples with multiple vacuum configurations

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DE102005055284A1 (en) 2005-11-17 2007-05-24 Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG samplers
CN104535370B (en) * 2015-01-15 2017-06-27 四川清和科技有限公司 Water quality automatic sampling device
CN113203603A (en) * 2021-05-25 2021-08-03 杭州力环科技有限公司 Environment-friendly sampling equipment for drinking water quality testing

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Publication number Priority date Publication date Assignee Title
US20110056312A1 (en) * 2009-09-08 2011-03-10 Endress + Hauser Conducta Gesellschaft Fur Mess-Und Regeltechnik Mbh + Co. Kg Apparatus for handling a liquid sample
US8607652B2 (en) * 2009-09-08 2013-12-17 Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG Apparatus for handling a liquid sample
US8911079B2 (en) 2010-09-27 2014-12-16 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens
WO2012044534A1 (en) 2010-09-27 2012-04-05 Johnson & Johnson Vision Care. Inc. Translating presbyopic contact lens
WO2012044532A1 (en) 2010-09-27 2012-04-05 Johnson & Johnson Vision Care, Inc. Asymmetric translating presbyopic contact lens
WO2012047549A1 (en) 2010-09-27 2012-04-12 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens
US9170434B2 (en) 2010-09-27 2015-10-27 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens
US9158129B2 (en) 2010-09-27 2015-10-13 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens
US9028063B2 (en) 2011-08-26 2015-05-12 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens pair
WO2013032681A1 (en) 2011-08-26 2013-03-07 Johnson & Johnson Vision Care, Inc. Translating presbyopic contact lens pair
US9823493B2 (en) 2012-08-30 2017-11-21 Johnson & Johnson Vision Care, Inc. Compliant dynamic translation zones for contact lenses
US8888277B2 (en) 2012-10-26 2014-11-18 Johnson & Johnson Vision Care, Inc. Contact lens with improved fitting characteristics
EP2725408A1 (en) 2012-10-26 2014-04-30 Johnson & Johnson Vision Care Inc. Contact lens with improved fitting characteristics
EP3104213A1 (en) 2015-06-08 2016-12-14 Johnson & Johnson Vision Care Inc. Contact lens with optimized performance and method of design
US9880399B2 (en) 2015-11-16 2018-01-30 Johnson & Johnson Vision Care, Inc. Truncated translating contact lens with optimized performance and method of design
EP3168674A1 (en) 2015-11-16 2017-05-17 Johnson & Johnson Vision Care Inc. Truncated translating contact lens with optimized performance and method of design
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DE102004015083A1 (en) 2005-10-13
US20050268733A1 (en) 2005-12-08
EP1580538A3 (en) 2011-01-26

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